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空中目标蒙皮温度场是形成目标红外图像的基本因素,掌握其瞬态或稳态分布特性与控制机制对于空中目标红外特征研究工作具有重要意义。通过分析控制蒙皮温度场的传热过程,建立了包括空中目标内部换热、蒙皮外气动对流与辐射换热的稳态耦合传热数理模型。在分析有限元数值计算方法及专业有限元法分析软件ANSYS的原理及特点的基础上,提出了利用ANSYS软件,运用有限元数值计算方法快速计算空中目标温度场的方法。并获得了巡航状况下目标蒙皮的温度场,分析了相关因素的影响。
The air target skin temperature field is the basic factor to form the target infrared image. It is of great significance to study the transient or steady-state distribution characteristics and the control mechanism for the infrared target of the air target. By analyzing and controlling the heat transfer process of the skin temperature field, a steady-state coupled heat transfer mathematical model including the heat transfer inside the air target, the aerodynamic convection outside the skin and the radiation heat transfer was established. On the basis of analyzing the principle and characteristics of finite element method and ANSYS software, ANSYS is proposed to quickly calculate the temperature field of air target by using the finite element numerical method. The temperature field of target skin under cruising condition was obtained, and the influence of related factors was analyzed.